TY - JOUR
T1 - Ring opening of decalin over zeolites
T2 - I. Activity and selectivity of proton-form zeolites
AU - Kubička, David
AU - Kumar, Narendra
AU - Mäki-Arvela, Päivi
AU - Tiitta, Marja
AU - Niemi, Vesa
AU - Salmi, Tapio
AU - Murzin, Dmitry Yu
N1 - Funding Information:
This work is part of the activities at Åbo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2005) by the Academy of Finland. The authors express their gratitude to Markku Reunanen (Åbo Akademi) and Kim Wickström (Fortum) for their contribution to the GC/MS analysis and to Caj Finnäs (Åbo Akademi) for his participation in the experiments. Economic support from Fortum and TEKES is gratefully acknowledged.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2004/2/15
Y1 - 2004/2/15
N2 - The activity of H-Beta-25, H-Beta-75, H-Y-12, H-Mordenite-20, and H-MCM-41 was investigated in the ring opening of decalin at 498-573 K in the presence of hydrogen. The catalysts activity and deactivation were correlated to their acidity determined by FTIR pyridine adsorption, pore structure, and surface area changes. Skeletal isomerization, stereoisomerization, ring opening, and cracking were the prevailing reactions taking place. Skeletal isomerization included several parallel and consecutive reactions resulting in a wide variety of products, which underwent ring opening, and subsequently cracking. Virtually no direct ring opening of decalin was observed; i.e., decalin must first be isomerized to alkyl-substituted bicyclononanes and bicyclooctanes to make possible its ring opening. The main products were grouped according to their structural features to evaluate the product distribution, which was influenced by catalyst acidity and pore structure. The initial activity of the catalysts increased with increasing acidity and reaction temperature, respectively. The deactivation of the investigated catalysts depended on their pore structure; H-Y was deactivated faster than Beta zeolites as it allowed the formation of large hydrocarbon intermediates inside the cavities.
AB - The activity of H-Beta-25, H-Beta-75, H-Y-12, H-Mordenite-20, and H-MCM-41 was investigated in the ring opening of decalin at 498-573 K in the presence of hydrogen. The catalysts activity and deactivation were correlated to their acidity determined by FTIR pyridine adsorption, pore structure, and surface area changes. Skeletal isomerization, stereoisomerization, ring opening, and cracking were the prevailing reactions taking place. Skeletal isomerization included several parallel and consecutive reactions resulting in a wide variety of products, which underwent ring opening, and subsequently cracking. Virtually no direct ring opening of decalin was observed; i.e., decalin must first be isomerized to alkyl-substituted bicyclononanes and bicyclooctanes to make possible its ring opening. The main products were grouped according to their structural features to evaluate the product distribution, which was influenced by catalyst acidity and pore structure. The initial activity of the catalysts increased with increasing acidity and reaction temperature, respectively. The deactivation of the investigated catalysts depended on their pore structure; H-Y was deactivated faster than Beta zeolites as it allowed the formation of large hydrocarbon intermediates inside the cavities.
KW - Acidity
KW - Decalin
KW - H-MCM-41
KW - Isomerization
KW - Ring opening
KW - Zeolite catalysts
UR - http://www.scopus.com/inward/record.url?scp=0842348129&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2003.10.027
DO - 10.1016/j.jcat.2003.10.027
M3 - Article
AN - SCOPUS:0842348129
SN - 0021-9517
VL - 222
SP - 65
EP - 79
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 1
ER -